Rotary damper



FIG. 1 is a perspective view of a rotary damper showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view; and,

FIG. 8 is a cross-sectional view thereof taken along line 8-8 in FIG. 2.

The broken lines depict portions of the rotary damper that form no part of claimed design. 

The ornamental design for a rotary damper, as shown and described. 